Net Heat Lost by Surface Calculator

✖The area is the amount of two-dimensional space taken up by an object.ⓘ Area [A]			+10% -10%
✖Emissivity is the ability of an object to emit infrared energy. Emissivity can have a value from 0 (shiny mirror) to 1.0 (blackbody). Most organic or oxidized surfaces have emissivity close to 0.95.ⓘ Emissivity [ε]			+10% -10%
✖Emissive Power of Blackbody is the energy of thermal radiation emitted in all directions per unit time from each unit area of a surface of blackbody at any given temperature.ⓘ Emissive Power of Blackbody [E_b]			+10% -10%
✖Absorptivity is the fraction of incident radiation flux absorbed by the body.ⓘ Absorptivity [α]			+10% -10%
✖Irradiation is the radiation flux incident on a surface from all directions.ⓘ Irradiation [G]			+10% -10%

✖Heat Transfer is the amount of heat that is transferred per unit of time in some material, usually measured in watts (joules per second).ⓘ Net Heat Lost by Surface [q]

⎘ Copy

👎

Formula

LaTeX

Reset

👍

Download Radiation Formula PDF PDF Image

Net Heat Lost by Surface Solution

STEP 0: Pre-Calculation Summary

Formula Used

Heat Transfer = Area*((Emissivity*Emissive Power of Blackbody)-(Absorptivity*Irradiation))
q = A*((ε*E_b)-(α*G))
This formula uses 6 Variables

Variables Used

Heat Transfer - (Measured in Watt) - Heat Transfer is the amount of heat that is transferred per unit of time in some material, usually measured in watts (joules per second).
Area - (Measured in Square Meter) - The area is the amount of two-dimensional space taken up by an object.
Emissivity - Emissivity is the ability of an object to emit infrared energy. Emissivity can have a value from 0 (shiny mirror) to 1.0 (blackbody). Most organic or oxidized surfaces have emissivity close to 0.95.
Emissive Power of Blackbody - (Measured in Watt per Square Meter) - Emissive Power of Blackbody is the energy of thermal radiation emitted in all directions per unit time from each unit area of a surface of blackbody at any given temperature.
Absorptivity - Absorptivity is the fraction of incident radiation flux absorbed by the body.
Irradiation - (Measured in Watt per Square Meter) - Irradiation is the radiation flux incident on a surface from all directions.

STEP 1: Convert Input(s) to Base Unit

Area: 50.3 Square Meter --> 50.3 Square Meter No Conversion Required
Emissivity: 0.95 --> No Conversion Required
Emissive Power of Blackbody: 700 Watt per Square Meter --> 700 Watt per Square Meter No Conversion Required
Absorptivity: 0.64 --> No Conversion Required
Irradiation: 0.8 Watt per Square Meter --> 0.8 Watt per Square Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

q = A*((ε*E_b)-(α*G)) --> 50.3*((0.95*700)-(0.64*0.8))

Evaluating ... ...

q = 33423.7464

STEP 3: Convert Result to Output's Unit

33423.7464 Watt --> No Conversion Required

FINAL ANSWER

33423.7464 ≈ 33423.75 Watt <-- Heat Transfer

(Calculation completed in 00.004 seconds)

You are here -

Home » Engineering » Chemical Engineering » Heat Transfer » Radiation » Radiation Exchange with Specular Surfaces » Net Heat Lost by Surface

Credits

Created by Ayush gupta

University School of Chemical Technology-USCT (GGSIPU), New Delhi

Ayush gupta has created this Calculator and 300+ more calculators!

Verified by Prerana Bakli

University of Hawaiʻi at Mānoa (UH Manoa), Hawaii, USA

Prerana Bakli has verified this Calculator and 1600+ more calculators!

< Radiation Exchange with Specular Surfaces Calculators

Net Heat Lost by Surface given Diffuse Radiosity

LaTeX Go Heat Transfer = ((Emissivity*Area)/(Diffuse Component of Reflectivity))*((Emissive Power of Blackbody*(Emissivity+Diffuse Component of Reflectivity))-Diffuse Radiosity)

Net Heat Lost by Surface

LaTeX Go Heat Transfer = Area*((Emissivity*Emissive Power of Blackbody)-(Absorptivity*Irradiation))

Diffuse Radiosity

LaTeX Go Diffuse Radiosity = ((Emissivity*Emissive Power of Blackbody)+(Diffuse Component of Reflectivity*Irradiation))

Reflectivity given Specular and Diffuse Component

LaTeX Go Reflectivity = Specular Component of Reflectivity+Diffuse Component of Reflectivity

< Important Formulas in Gas Radiation, Radiation Exchange with Specular Surfaces and more Special Cases Calculators

Initial Radiation Intensity

LaTeX Go Initial Radiation Intensity = Radiation Intensity at Distance x/exp(-(Monochromatic Absorption Coefficient*Distance))

Monochromatic Transmissivity

LaTeX Go Monochromatic Transmissivity = exp(-(Monochromatic Absorption Coefficient*Distance))

Monochromatic Absorption Coefficient if Gas is Non-Reflecting

LaTeX Go Monochromatic Absorption Coefficient = 1-Monochromatic Transmissivity

Monochromatic Transmissivity if Gas is Non Reflecting

LaTeX Go Monochromatic Transmissivity = 1-Monochromatic Absorption Coefficient

Net Heat Lost by Surface Formula

LaTeX Go

Heat Transfer = Area*((Emissivity*Emissive Power of Blackbody)-(Absorptivity*Irradiation))
q = A*((ε*E_b)-(α*G))

What is Radiation?

Radiation is energy that comes from a source and travels through space at the speed of light. This energy has an electric field and a magnetic field associated with it, and has wave-like properties. You could also call radiation “electromagnetic waves”.

What is Reflectivity?

A measure of the ability of a surface to reflect radiation, equal to the reflectance of a layer of material sufficiently thick for the reflectance not to depend on the thickness.

How to Calculate Net Heat Lost by Surface?

Net Heat Lost by Surface calculator uses Heat Transfer = Area*((Emissivity*Emissive Power of Blackbody)-(Absorptivity*Irradiation)) to calculate the Heat Transfer, The Net Heat Lost by Surface formula is defined as the function of area of heat transfer, emissivity, emissive power of blackbody, absorptivity and irradiation. Heat loss is the intentional or unintentional movement of heat from one material to another. This can happen through conduction, convection and radiation. Conduction often occurs when an insulated or uninsulated component is in direct contact with another component. Heat Transfer is denoted by q symbol.

How to calculate Net Heat Lost by Surface using this online calculator? To use this online calculator for Net Heat Lost by Surface, enter Area (A), Emissivity (ε), Emissive Power of Blackbody (E_b), Absorptivity (α) & Irradiation (G) and hit the calculate button. Here is how the Net Heat Lost by Surface calculation can be explained with given input values -> 33423.75 = 50.3*((0.95*700)-(0.64*0.8)).

FAQ

What is Net Heat Lost by Surface?

The Net Heat Lost by Surface formula is defined as the function of area of heat transfer, emissivity, emissive power of blackbody, absorptivity and irradiation. Heat loss is the intentional or unintentional movement of heat from one material to another. This can happen through conduction, convection and radiation. Conduction often occurs when an insulated or uninsulated component is in direct contact with another component and is represented as q = A*((ε*E_b)-(α*G)) or Heat Transfer = Area*((Emissivity*Emissive Power of Blackbody)-(Absorptivity*Irradiation)). The area is the amount of two-dimensional space taken up by an object, Emissivity is the ability of an object to emit infrared energy. Emissivity can have a value from 0 (shiny mirror) to 1.0 (blackbody). Most organic or oxidized surfaces have emissivity close to 0.95, Emissive Power of Blackbody is the energy of thermal radiation emitted in all directions per unit time from each unit area of a surface of blackbody at any given temperature, Absorptivity is the fraction of incident radiation flux absorbed by the body & Irradiation is the radiation flux incident on a surface from all directions.

How to calculate Net Heat Lost by Surface?

The Net Heat Lost by Surface formula is defined as the function of area of heat transfer, emissivity, emissive power of blackbody, absorptivity and irradiation. Heat loss is the intentional or unintentional movement of heat from one material to another. This can happen through conduction, convection and radiation. Conduction often occurs when an insulated or uninsulated component is in direct contact with another component is calculated using Heat Transfer = Area*((Emissivity*Emissive Power of Blackbody)-(Absorptivity*Irradiation)). To calculate Net Heat Lost by Surface, you need Area (A), Emissivity (ε), Emissive Power of Blackbody (E_b), Absorptivity (α) & Irradiation (G). With our tool, you need to enter the respective value for Area, Emissivity, Emissive Power of Blackbody, Absorptivity & Irradiation and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Heat Transfer?

In this formula, Heat Transfer uses Area, Emissivity, Emissive Power of Blackbody, Absorptivity & Irradiation. We can use 2 other way(s) to calculate the same, which is/are as follows -

Heat Transfer = ((Emissivity*Area)/(Diffuse Component of Reflectivity))*((Emissive Power of Blackbody*(Emissivity+Diffuse Component of Reflectivity))-Diffuse Radiosity)
Heat Transfer = ((Emissivity*Area)/(Diffuse Component of Reflectivity))*((Emissive Power of Blackbody*(Emissivity+Diffuse Component of Reflectivity))-Diffuse Radiosity)

Home

FREE PDFs

🔍 Search